Evidence map›Paper›PMID 32372239›Full record

ArticleArchives of orthopaedic and trauma surgery2020

Revision total knee arthroplasty for patellar dislocation in patients with malrotated TKA components.

Yaniv Warschawski, Simon Garceau, Tal Frenkel Rutenberg, Omar Dahduli, Jesse Wolfstadt, David Backstein

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Article in Archives of orthopaedic and trauma surgery, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
1.6field-weighted citation impact, top 16% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

Yaniv WarschawskiDivision of Orthopaedic Surgery, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada. yanivarsh@gmail.com.
Simon GarceauDivision of Orthopaedic Surgery, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada.
Tal Frenkel RutenbergOrthopedic Department, Rabin Medical Center, Beilinson Hospital, Affiliated to the Sackler Faculty of Medicine, Tel Aviv University, 39 Jabotinsky St., 49100, Petah Tikva, Israel.
Omar DahduliDivision of Orthopaedic Surgery, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada.
Jesse WolfstadtDivision of Orthopaedic Surgery, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada.
David BacksteinDivision of Orthopaedic Surgery, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada.
University of Toronto · CAMount Sinai Hospital · CARabin Medical Center · IL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposePatellar dislocation is a serious complication leading to patient morbidity following total knee arthroplasty (TKA). The cause can be multifactorial. Extensor mechanism imbalance may be present and result from technical errors such as malrotation of the implants. We sought to understand the reasons for post-arthroplasty patellar dislocation and the clinical outcomes of patients in whom it occurs.

methodsThis is a retrospective cohort study assessing the outcomes of revision surgery for patellar dislocation in patients with component malrotation in both primary and revision TKAs. Patient demographics, dislocation etiology, presurgical deformity, intraoperation component position, complications, reoperation, and Knee Society Scores (KSS) were collected.

resultsTwenty patients (21 knees) were identified. The average time from primary arthroplasty to onset of dislocation was 33.6 months (SD 44.4), and the average time from dislocation to revision was 3.38 months (SD 2.81). Seventeen knees (80.9%) had internal rotation of the tibial component and seven knees (33.3%) had combined internal rotation of both the femoral and tibial components. Fifteen knees (71.4%) were treated with a condylar constrained implant at the time of revision, and five knees were converted to a hinged prosthesis. The average follow-up time was 56 months. During this time, one patient (4.54%) had a recurrent dislocation episode, requiring further surgery. At final follow up, the mean KSS was 86.2.

conclusionRevision TKA following patellar dislocation for patients with malrotated components was associated with high success rates. After revision surgery, patients had a low recurrence of patellar dislocation, low complication rates, and excellent functional outcomes.

Indexed as

Arthroplasty, Replacement, KneeReoperationHumansKnee JointKnee ProsthesisPatellar DislocationPostoperative ComplicationsRetrospective StudiesKnee arthroplasty complicationsMalrotationPatellar dislocationRevision TKA

Identifiers

PMID32372239
OpenAlexW3022328703

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.